Improve deployment index page
### Description This was issued out from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22380#note_110110835 Today, we have deployment index page. It looks like ![Screenshot_from_2018-10-17_16-00-19](/uploads/f5918ffe218939d5398a3afb9079dc70/Screenshot_from_2018-10-17_16-00-19.png) Here is a couple of thoughts from @dimitrieh > - Real time updating of the list (so deployments go from deploying => deployed similar to pipeline list view or merge request widget) > - "Deploying" badge > - removal of action buttons when the row represents a deploying deployment > - env Stop button disabled when there is a deployment in progress
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